US8323827B2 - Laminate packing material for battery and laminate battery - Google Patents

Laminate packing material for battery and laminate battery Download PDF

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Publication number
US8323827B2
US8323827B2 US12/158,548 US15854806A US8323827B2 US 8323827 B2 US8323827 B2 US 8323827B2 US 15854806 A US15854806 A US 15854806A US 8323827 B2 US8323827 B2 US 8323827B2
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Prior art keywords
battery
packaging material
external packaging
main body
laminated external
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US20100040942A1 (en
Inventor
Kazuhito Hatta
Masato Sato
Tsuyoshi Sugiyama
Hiroyuki Yamada
Tadashi Miebori
Koji Minamitani
Hiroshi Hata
Koji Miyano
Jun Tanigawa
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Resonac Packaging Corp
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Showa Denko Packaging Co Ltd
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Priority claimed from JP2005369446A external-priority patent/JP5209847B2/ja
Priority claimed from JP2005369460A external-priority patent/JP5235270B2/ja
Application filed by Showa Denko Packaging Co Ltd filed Critical Showa Denko Packaging Co Ltd
Assigned to SHOWA DENKO PACKAGING CO. reassignment SHOWA DENKO PACKAGING CO. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SATO, MASATO, MIEBORI, TADASHI, SUGIYAMA, TSUYOSHI, YAMADA, HIROYUKI, HATTA, KAZUHITO, MINAMITANI, KOJI, MIYANO, KOJI, TANIGAWA, JUN, HATA, HIROSHI
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Assigned to RESONAC PACKAGING CORPORATION reassignment RESONAC PACKAGING CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SHOWA DENKO PACKAGING CO.
Assigned to RESONAC PACKAGING CORPORATION reassignment RESONAC PACKAGING CORPORATION CORRECTIVE ASSIGNMENT TO CORRECT THE THE ASSIGNEE'S ADDRESS PREVIOUSLY RECORDED AT REEL: 064370 FRAME: 0076. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT . Assignors: SHOWA DENKO PACKAGING CO.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • H01M50/126—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/131—Primary casings, jackets or wrappings of a single cell or a single battery characterised by physical properties, e.g. gas-permeability or size
    • H01M50/133—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a laminated external packaging material for wrapping around a main body of a battery for use as a power source for a mobile device, such as, e.g., a mobile telephone, a notebook-size personal computer, or a digital camera, and also relates to a laminate battery, i.e., a battery packaged with the laminated external packaging material.
  • the present invention aims to provide a laminated external packaging material capable of easily and assuredly bonding to a battery main body without using an adhesive tape or a hot-melt adhesive, and also, in the case of using plastic components for reinforcing end portions of the battery main body, capable of firmly bonding to the plastic component, which in turn can reduce the number of components constituting a laminate battery and also can simplify a battery production line.
  • the present invention provides the following means.
  • a laminated external packaging material for a battery wherein a metallic foil is adhered to one surface side of a base film, and wherein a coated film layer of thermal adhesive resin having a softening point of 160° C. or below and capable of thermally bonding to a surface film of a battery main body is formed on the other surface side of the base film.
  • thermoset resin layer having a thickness of 0.5 to 5 ⁇ m is adhered to a surface of the metallic foil opposite to the base film adhering side of the metallic foil.
  • a laminate battery wherein the laminated external packaging material as recited in any one of the aforementioned Items 1 to 7 are wrapped around a battery main body with the coated film layer side of the packaging material in contact with the battery main body and thermally bonded thereto, and wherein at least a part of an end portion reinforcing plastic component is inserted in each cylindrical portion constituted by an excessive portion of the laminated external packaging material and protruded from each of both ends of the battery main body and thermally bonded to the base film of the laminated external packaging material.
  • a laminated external packaging material for a battery wherein a metallic foil is adhered to one surface side of a base film, and wherein a coated film layer of thermal adhesive resin having a softening point of 160° C. and capable of thermally bonding to a surface film of a battery main body is formed on the other surface side of the base film in a state in which base film exposed edge portions are remained at both widthwise edge portions of the base film.
  • thermoset resin layer having a thickness of 0.5 to 5 ⁇ m is adhered to a surface of the metallic foil opposite to the base film adhering side of the metallic foil.
  • a laminate battery wherein the laminated external packaging material as recited in any one of the aforementioned Items 9 to 14 are wrapped around a battery main body with the coated film layer side of the packaging material in contact with the battery main body and thermally bonded thereto, and wherein at least a part of an end portion reinforcing plastic component is inserted in each cylindrical portion constituted by an excessive portion of the laminated external packaging material and each protruded from both ends of the battery main body and thermally bonded to a base film exposed edge portion of an inner surface of the cylindrical portion.
  • a hard aluminum foil means an aluminum foil in a work hardened state after working (rolling), and can be exemplified by, for example, a foil obtained by executing work hardening or a foil obtained by executing an appropriate heat treatment after work hardening, such as, e.g., foils generally called HX1, HX2, HX3, HX4, HX5, HX6, HX7, HX8, HX9 (where X: 1 to 3) in accordance with JIS Standard (JIS H0001).
  • a soft aluminum foil means an aluminum foil other than the aforementioned hard aluminum foil, and can be exemplified by foils in a softened state after full annealing, such as, e.g., foils generally called “O material” in accordance with JIS standard (JIS H0001).
  • the laminated external packaging material for a battery according to the invention [1] itself is provided with a coated film layer capable of thermally bonding to a surface film of a battery main body. Therefore, at the time of packaging the battery main body, without using any adhesive tape or hot-melt adhesive, the packaging material can be thermally bonded directly to the battery main body with easy, which enables reduction of the number of parts constituting a laminate battery and simplification of the battery production line. Since the coated film layer is made of thermal adhesive resin having a softening point of 160° C. or below, the laminated external packaging material can be bonded to the battery main body by a temperature heating of 160° C.
  • the packaging material wraps around the battery main body with the coated film layer side in contact with the battery main body, which in turn can prevent thermal degradation, such as, e.g., melting of separators in the battery main body or decomposition of the electrolytic solution.
  • thermal degradation such as, e.g., melting of separators in the battery main body or decomposition of the electrolytic solution.
  • the thermal adhesive resin of the coated film layer is ethylene-vinyl acetate copolymer, which exerts thermal adhesiveness excellent to the surface film of the battery main body and decreases viscosity when heated to exert high thermal fluidity. Therefore, in the case of using an end portion reinforcing plastic component, when the plastic component and the laminated external packaging material are thermally pressure-bonded at a high temperature, the molten thermal adhesive resin of the coated film layer will be removed from the pressure-bonded portion, resulting in strong adhesion between the base film and the plastic component.
  • the coated film layer of the laminated external packaging material for a battery has a certain thickness, thermal bonding to the battery main body can be performed at a low temperature in a short time period. Furthermore, in the thermal pressure-bonding to the end portion reinforcing plastic component, the resin can be easily removed from the pressure-bonded portion at the time of thermal bonding.
  • the base film of the laminated external packaging material for a battery is capable of thermally bonding to an end portion reinforcing plastic component of the laminate battery, the base film and the plastic component can be strongly bonded by high temperature pressure bonding at a portion away from the battery main body.
  • the oriented film having a specified thickness adhered to the external surface of the metallic foil of the laminated external packaging material for a battery functions as a protection layer, abrasion resistance, impact resistance, and chemical resistance can be given to the external packaging of the laminate battery.
  • thermoset resin layer having a specified thickness adhered to the external surface of the metallic foil of the laminated external packaging material for a battery functions as a protection layer, abrasion resistance, impact resistance, and chemical resistance can be given to the external packaging of the laminate battery.
  • the aforementioned laminated external packaging material for a battery can be bonded assuredly to the battery main body and the end portion reinforcing plastic component can be strongly bonded to the base film of the laminated external packaging material at both ends of the battery.
  • the packaging material itself is provided with a coated film layer capable of thermally bonding to the surface film of the battery main body, at the time of packaging the battery main body, without using any adhesive tape or hot-melt adhesive, the packaging material can be thermally bonded directly to the battery main body with easy, which enables reduction of the number of parts constituting a laminate battery and simplification of the battery production line.
  • the coated film layer is made of thermal adhesive resin having a softening point of 160° C. or below, the laminated external packaging material can be bonded to the battery main body by a temperature heating of 160° C.
  • the packaging material wraps the battery main body with the coated film layer side in contact with the battery main body, which in turn can prevent thermal degradation, such as, e.g., melting of separators in the battery main body or decomposition of the electrolytic solution.
  • thermal degradation such as, e.g., melting of separators in the battery main body or decomposition of the electrolytic solution.
  • high battery performance can be maintained.
  • the external packaging material and the plastic component can be strongly bonded by thermally pressure-bonding the exposed edge portion of the base film of the external packaging material and the plastic component.
  • the thermal adhesive resin of the coated film layer is ethylene-vinyl acetate copolymer, excellent thermal adhesiveness to a surface film of a battery main body can be exerted even by low temperature pressure-bonding.
  • the base film of the laminated external packaging material for a battery is capable of thermally bonding to an end portion reinforcing plastic component, the exposed edge portion of the base film of the external packaging material and the plastic component can be bonded strongly.
  • the oriented film having a specified thickness adhered to the external surface of the metallic foil of the laminated external packaging material for a battery functions as a protection layer, abrasion resistance, impact resistance, and chemical resistance can be given to the external packaging of the laminate battery.
  • thermoset resin layer having a specified thickness adhered to the external surface of the metallic foil of the laminated external packaging material for a battery functions as a protection layer, abrasion resistance, impact resistance, and chemical resistance can be given to the external packaging of the laminate battery.
  • the aforementioned laminated external packaging material for a battery can be bonded assuredly to the battery main body and the end portion reinforcing plastic component can be strongly bonded to the base film of the laminated external packaging material at both ends of the battery.
  • FIG. 1 sequentially shows steps of forming external packaging for a laminate battery to which a first invention is applied
  • FIG. 1(A) is a schematic perspective view showing a state before wrapping a battery main body with a laminated external packaging material
  • FIG. 1(B) is a schematic perspective view showing a state after the wrapping
  • FIG. 1(C) is a schematic perspective view showing an external packaging completion state in which end portion reinforcing plastic components are attached.
  • FIG. 2 is a vertical cross-sectional view of the laminated external packaging material for a battery according to an embodiment of the first embodiment.
  • FIG. 3 is a vertical cross-sectional view of a laminated external packaging material for a battery according to another embodiment.
  • FIG. 4 is a vertical cross-sectional view of a laminated external packaging material for a battery according to still another embodiment.
  • FIG. 5 sequentially shows steps of forming external packaging for a laminate battery to which a second invention is applied
  • FIG. 5(A) is a schematic perspective view showing a state before wrapping a battery main body with a laminated external packaging material
  • FIG. 5(B) is a schematic perspective view showing a state after the wrapping
  • FIG. 5(C) is a schematic perspective view showing an external packaging completion state in which end portion reinforcing plastic components are attached.
  • FIG. 6 shows a cross-sectional view (cross-section taken along the line X-X in FIG. 5 ) of the laminated external packaging material for a battery according to an embodiment of the second embodiment.
  • FIG. 7 is a cross-sectional view of a laminated external packaging material for a battery according to another embodiment.
  • FIG. 8 is a cross-sectional view of a laminated external packaging material for a battery according to still another embodiment.
  • FIG. 9 is a cross-sectional view of a laminated external packaging material for a battery according to still yet another embodiment.
  • FIG. 10 is a plan view showing a laminated external packaging material before the cutting step in a production process.
  • FIGS. 1(A) to 1(C) sequentially show steps of forming the external packaging of a laminate battery to which the first invention is applied.
  • This laminate battery is formed by disposing a battery main body 10 of a rectangular parallelepiped shape on a laminated external packaging material 11 having a width wider than that of the battery main body 10 as shown in FIG. 1(A) , wrapping the battery main body 10 with the laminated external packaging material 11 as shown in FIG. 1(B) and thermally bonding the packaging material to the battery main body, inserting a part of an end portion reinforcing plastic component 12 of a rectangular parallelepiped shape into each rectangular cylindrical portion 11 a formed, at each end of the main body, by both side excessive portions of the laminated external packaging material 11 as shown in FIG. 1(C) and then thermally bonding the packaging material 11 to the plastic component 12 .
  • the reference numeral “ 10 a ” in these figures denotes a terminal of the battery.
  • the battery main body 10 can be, e.g., a lithium-ion battery or a lithium-polymer battery with a surface formed by an oriented film, such as, e.g., a polyethylene terephthalate (PET) film, a polyethylene naphthalate (PEN) film, a polyamide (ON) film, or a polypropylene (OPP) film.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • OPP polypropylene
  • the laminated external packaging material 11 has a fundamental structure comprising a base film 1 , a metallic foil 2 adhered to one surface of the base film 1 via an adhesive layer 3 , and a coated film layer 4 of thermal adhesive resin adhered to the other surface of the base film 1 .
  • the base film 1 can be a thermoplastic resin film, such as, e.g., a polypropylene (OPP) film, a polyethylene (PE) film, a polycarbonate (PC) film, an acrylonitrile-butadiene-styrene resin (ABS) film, or an adhesive polyamide (ON) film such as a 12 nylon.
  • a thermoplastic resin film such as, e.g., a polypropylene (OPP) film, a polyethylene (PE) film, a polycarbonate (PC) film, an acrylonitrile-butadiene-styrene resin (ABS) film, or an adhesive polyamide (ON) film such as a 12 nylon.
  • OPP polypropylene
  • PE polyethylene
  • PC polycarbonate
  • ABS acrylonitrile-butadiene-styrene resin
  • ON adhesive polyamide
  • the thickness of this base film 1 is preferably set to about 20 to 100 ⁇ m to attain assured bonding to the uneven surface of the battery main body 10 by the pressure buffering function. If it is too thin, the pressure buffering function becomes insufficient, resulting in defective bonding to the uneven battery surface. Excessive thickness hardens the film, resulting in defective bonding.
  • the metallic foil 2 although it is not specifically limited, for example, a stainless foil, an iron foil, a copper foil, a nickel foil, and a hard aluminum foil can be exemplified. Among these foils, a hard aluminum foil can be preferable used.
  • the thickness falls within the range of about 40 to 200 ⁇ m. If it is too thin, the material strength becomes insufficient. On the other hand, excessive thickness results in significantly deteriorated workability.
  • the adhesive components of the adhesive layer 3 polyester-urethane series or polyether-urethane series adhesive components can be preferably used.
  • the thermal adhesive resin of the coated film layer 4 it is not specifically limited as long as the thermal adhesive resin has a softening point of 160° C. or below and can be bonded to the surface film of the battery main body 10 .
  • the thermal adhesive resin is ethylene-vinyl acetate copolymer (hereinafter abbreviated as “EVA”) excellent in adhesiveness to an oriented film.
  • EVA ethylene-vinyl acetate copolymer
  • the thermal bonding temperature to the battery main body 10 should be higher, which may cause thermal degradation, such as, e.g., melting of separators in the battery main body 10 or decomposition of the electrolytic solution.
  • the EVA for the coated film layer 4 it is preferable that the EVA is 30 to 95 mass % in vinyl acetate content and 3 or more in MI (melt index) because of the following reasons. If the vinyl acetate content is less than 30 mass %, it hardly solves in a solvent such as alcohol, resulting in difficult application to the base film 1 . If the MI is less than 3, the thermal fluidity is poor, and therefore the molten EVA is hardly removed from the bonding portion to the end portion reinforcing plastic component 12 at the time of the thermal bonding, which in turn prevents strong bonding between the plastic component 12 and the base film 1 .
  • the EVA can be partially saponified into a graft polymer containing, e.g., an acetoxyl group, a carboxyl group, or a hydroxyl group to enhance the solubility to a solvent such as alcohol.
  • a small amount of ethylene-acrylate copolymer (EEA) can be added to ethylene-vinyl acetate copolymer.
  • a tackifier ingredient for improving the adhesion to the base film 1 and the hot tackiness and an antiblocking agent for preventing the blocking of the laminated external packaging material 11 in a wrapped state to the coated film layer 4 within the range of about 1 to 20 mass % to the resin, respectively.
  • the tackifier ingredient As the aforementioned tackifier ingredient, terpene phenol resin, rosin and rosinester and petroleum resin can be exemplified. Although two or more of these ingredients can be used together, it is especially preferable that the tackifier ingredient has a softening point of 60 to 160° C. and an average molecular weight of 3,000 or less. If the softening point is below than 60° C., blocking can easily occur. If it exceeds 160° C., the thermal adhesiveness cannot be exerted at low temperatures. The average molecular weight exceeding 3,000 causes deterioration of solubility and compatibility to ethylene-vinyl acetate copolymer.
  • inorganic particles such as, e.g., SiO 2 , CaCO 3 , BaCO 3 , TiO 2 or talc.
  • the inorganic particle has an average particle diameter of 1 to 10 ⁇ m and specific gravity of 3 or less. If the average particle diameter is less than 1 ⁇ m, the particles of the antiblocking agent agglutinates, which makes it difficult to be dispersed in the resin. To the contrary, if it exceeds 10 ⁇ m, clogging of a gravure plate occurs at the time of the gravure coating for forming the coated film layer 4 .
  • specific gravity exceeds 3, the particles tend to be easily settled out in the resin when heat is applied at the drying step after the coating, which may prevent exertion of antiblocking effects. Therefore, it is not preferable.
  • the coated film layer 4 can be formed on the base film 1 by adding resin components, such as, e.g., the aforementioned ethylene-vinyl acetate copolymer, and, if necessary, tackifier ingredient and antiblocking agent, to alcohol, mixing them into an emulsion, applying the emulsion on a base film 1 by a gravure coating method, and then drying it.
  • the thickness of this coated film layer 4 is preferably set to as thin as 0.5 to 10 ⁇ m. It is technically difficult to decrease the thickness below 0.5 ⁇ m. If it exceeds 10 ⁇ m, it becomes difficult to be removed due to the thermal fluidity at the time of the thermal bonding to the end portion reinforcing plastic component 12 , which makes it difficult to attain strong bonding between the base film 1 and the plastic component 12 .
  • the laminated external packaging material 11 is disposed with the coated film layer 4 facing up. Then, the battery main body 10 is disposed on the packaging material 11 as shown in FIG. 1(A) . Thereafter, as shown in FIG. 1(B) , the laminated external packaging material 11 is wrapped around the battery main body 10 and thermally bonded thereto by pressing a heated plate of 160° C. or below against the packaging material 11 from the outside thereof. As a result, the battery main body 10 and the laminated external packaging material 11 are thermally bonded and integrated with each other.
  • the temperature for the thermal bonding is low, which prevents occurrence of thermal degradation, such as, e.g., melting of separators in the battery main body 10 or decomposition of the electrolytic solution. As a result, the high performance of the battery can be maintained.
  • both widthwise side excessive portions of the laminated external packaging material 11 will be formed into a cylindrical portion 11 a , respectively, at both ends of the battery main body 10 .
  • a part of an end portion reinforcing plastic component 12 is fitted into the cylindrical portion 11 a as shown in FIG. 1(C) and then a heated plate of 180 to 220° C. is pressed against the laminated external packaging material 11 and the plastic component 12 from the outside thereof to thermally bond them with each other.
  • the thermal adhesive resin of the coated film layer 4 forming both side cylindrical portions 11 a and 11 a of the laminated external packaging material 11 will turn into a molten solution low in viscosity and high in fluidity due to the high thermal pressure bonding temperature, and will be removed from the pressure bonding portion by the pressure of the heated plate.
  • the base film 1 of the laminated external packaging material 11 and the plastic component 12 which are made of the same series resin, will be direct-bonded firmly and integrated with each other. This high temperature thermal pressure-bonding is performed at a position away from the battery main body 10 , and therefore there will be no risk of heat deterioration of the battery main body 10 .
  • a protection layer can be preliminarily provided on the surface of the metallic foil 2 to give abrasion resistance, impact resistance, chemical resistance, or the like.
  • Such protection layer can be formed by adhering an oriented film 5 on the surface of the metallic foil 2 opposite to the adhering side of the base film 1 via an adhesive layer 6 as shown in FIG. 3 or by applying thermoset resin on the surface of the metallic foil 2 opposite to the adhering side of the base film 1 to thereby form a thermoset resin layer 7 as shown in FIG. 4 .
  • the oriented film 5 a commonly used inexpensive all-purpose resin film, such as, e.g., PET, PEN, ON or OPP, can be used. It is preferable that the thickness thereof falls within the range of 8 to 40 ⁇ m. If it is less than 8 ⁇ m, it lacks versatility. If it exceeds 40 ⁇ m, it becomes expensive and the workability deteriorates. Furthermore, in order to improve the abrasion resistance, the oriented film 5 can be an oriented film with silica or alumina vacuum-deposited on the surface thereof, an oriented film with siloxane series resin coated on the surface thereof, or an oriented film with a roughened surface.
  • the adhesive layer 6 can be the same as or similar to the adhesive layer 3 for adhering the base film 1 and the metallic foil 2 .
  • thermoset resin layer 7 can be made of resin, such as, e.g., epoxy series resin, acrylic series resin, or nitrocellulose series resin, capable of forming a rigid film by thermal hardening.
  • resin such as, e.g., epoxy series resin, acrylic series resin, or nitrocellulose series resin, capable of forming a rigid film by thermal hardening.
  • siloxane series resin of 5 mass % or less can be added to the aforementioned resin. It is preferable that the thickness of the thermoset resin layer 7 falls within the range of 0.5 to 5 ⁇ m. If it is too thin, insufficient effect as a protection layer can be obtained. To the contrary, if it is excessively thick, the resin layer becomes brittle and the processing unit cost also increases.
  • FIGS. 5(A) to 5(C) sequentially show steps of forming the external packaging of a laminate battery to which the second invention is applied.
  • This laminate battery is formed by disposing a battery main body 10 of a rectangular parallelepiped shape on a laminated external packaging material 11 having a width wider than that of the battery main body 10 as shown in FIG. 5(A) , wrapping the battery main body 10 with the laminated external packaging material 11 and thermally bonding the coated film layer 4 of the laminated external packaging material 11 to the surface film of the battery main body 10 as shown in FIG.
  • the battery main body 10 can be, e.g., a lithium-ion battery or a lithium-polymer battery with a surface formed by an oriented film, such as, e.g., a polyethylene terephthalate (PET) film, a polyethylene naphthalate (PEN) film, a polyamide (ON) film, or a polypropylene (OPP) film.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • OPP polypropylene
  • the laminated external packaging material 11 has a fundamental structure comprising a base film 1 , a metallic foil 2 adhered to one surface of the base film 1 via an adhesive layer 3 , and a coated film layer 4 of thermal adhesive resin adhered to the other surface of the base film 1 with exposed side edge portions 1 a and 1 a of the base film 1 remained at both widthwise side edge portions of the base film 1 .
  • the base film 1 can be a thermoplastic resin film, such as, e.g., a polypropylene (CPP) film, a polyethylene (PE) film, a polycarbonate (PC) film, an acrylonitrile-butadiene-styrene resin (ABS) film, or an adhesive polyamide (ON) film such as a 12 nylon.
  • a thermoplastic resin film such as, e.g., a polypropylene (CPP) film, a polyethylene (PE) film, a polycarbonate (PC) film, an acrylonitrile-butadiene-styrene resin (ABS) film, or an adhesive polyamide (ON) film such as a 12 nylon.
  • the base film 1 is made of a film of thermoplastic resin which is the same series resin of the plastic component 12 , more preferably a film of olefin series resin excellent in workability and insulation properties.
  • the thickness of this base film 1 is preferably set to about 20 to 100 ⁇ m to attain assured adhering to the uneven surface of the battery main body 10 by the pressure buffering function. If it is too thin, the pressure buffering function becomes insufficient, resulting in defective bonding to the uneven battery surface. Excessive thickness hardens the film, resulting in defective bonding.
  • the metallic foil 2 although it is not specifically limited, for example, a stainless foil, an iron foil, a copper foil, a nickel foil, and a hard aluminum foil can be exemplified. Among these foils, a hard aluminum foil can be preferable used.
  • the thickness falls within the range of about 40 to 200 ⁇ m. If it is too thin, the material strength becomes insufficient. On the other hand, excessive thickness results in significantly deteriorated workability.
  • polyester-urethane series or polyether-urethane series adhesive ingredients can be preferably used.
  • the thermal adhesive resin of the coated film layer 4 it is not specifically limited as long as the thermal adhesive resin has a softening point of 160° C. or below and can be bonded to the surface film of the battery main body 10 .
  • the thermal adhesive resin is ethylene-vinyl acetate copolymer (hereinafter abbreviated as “EVA”) excellent in adhesiveness to an oriented film.
  • EVA ethylene-vinyl acetate copolymer
  • the thermal bonding temperature to the battery main body 10 should be higher, which may cause thermal degradation, such as, e.g., melting of separators in the battery main body 10 or decomposition of the electrolytic solution.
  • the EVA for the coated film layer 4 it is preferable that the EVA is 30 to 95 mass % in vinyl acetate content and 3 or more in MI (melt index) because of the following reasons. If the vinyl acetate content is less than 30 mass %, it hardly solves in a solvent such as alcohol, resulting in difficult application to the base film 1 .
  • the EVA can be partially saponified into a graft polymer containing, e.g., an acetoxyl group, a carboxyl group, or a hydroxyl group to enhance the solubility to a solvent such as alcohol.
  • a small amount of ethylene-acrylate copolymer (EEA) can be added to ethylene-vinyl acetate copolymer.
  • a tackifier ingredient for improving the adhesion to the base film 1 and the hot tackiness and an antiblocking agent for preventing the blocking of the laminated external packaging material 11 in a wrapped state to the coated film layer 4 within the range of about 1 to 20 mass % to the resin, respectively.
  • the tackifier ingredient As the aforementioned tackifier ingredient, terpene phenol resin, rosin and rosinester and petroleum resin can be exemplified. Although two or more of these ingredients can be used together, it is especially preferable that the tackifier ingredient has a softening point of 60 to 160° C. and an average molecular weight of 3,000 or less. If the softening point is below than 60° C., blocking can easily occur. If it exceeds 160° C., the thermal adhesiveness cannot be exerted at low temperatures. The average molecular weight exceeding 3,000 causes deterioration of solubility and compatibility to ethylene-vinyl acetate copolymer.
  • inorganic particles such as, e.g., SiO 2 , CaCO 3 , BaCO 3 , TiO 2 or talc.
  • the inorganic particle has an average particle diameter of 1 to 10 ⁇ m and specific gravity of 3 or less. If the average particle diameter is less than 1 ⁇ m, the particles of the antiblocking agent agglutinates, which makes it difficult to be dispersed in the resin. On the other hand, if it exceeds 10 ⁇ m, clogging of a gravure plate occurs at the time of the gravure coating for forming the coated film layer 4 .
  • specific gravity exceeds 3, the particles tend to be easily settled out in the resin when heat is applied at the drying step after the coating, which may prevent exertion of antiblocking effects. Therefore, it is not preferable.
  • the coated film layer 4 can be formed on the base film 1 by adding resin components, such as, e.g., the aforementioned ethylene-vinyl acetate copolymer, and, if necessary, tackifier ingredient and antiblocking agent, to alcohol, mixing them into an emulsion, applying the emulsion on a base film 1 by a gravure coating method, and then drying it.
  • resin components such as, e.g., the aforementioned ethylene-vinyl acetate copolymer, and, if necessary, tackifier ingredient and antiblocking agent
  • coloring agent such as, e.g., organic series colorant, inorganic series colorant, or pigment, can be added to the resin components forming the coated film layer 4 within the range of 0.1 to 5 mass parts with respect to the resin component of 100 mass parts.
  • a narrow linear cutting line indication coated portion 20 can be simultaneously formed between adjacent exposed side edge portions 1 a and 1 a as shown in FIG. 10 .
  • this cutting line indication coated portion 20 is colored, a positioning sensor of a cutting apparatus (width adjustable apparatus) can recognize the cutting line indication coated portion 20 at the time of cutting processing, which enables assured positioning of the cutting position.
  • organic series colorant is not specifically limited, for example, azo series colorant, such as, e.g., lake red, naphthol, hanza yellow, disazo yellow, or benzimidazolone, polycyclic series colorant, such as, e.g., quinophtalone, isoindline, pyrrolopyrrole, dioxazine, phthalocyanine blue, or phtalocyanine green, and lake colorant, such as, e.g., lake red C or Watchung red can be exemplified.
  • the inorganic series colorant is not specifically limited, for example, carbon black, titanium oxide, calcium carbonate, kaolin, iron oxide, and zinc oxide can be exemplified.
  • the pigment is not specifically limited, for example, yellow pigment such as trisodium salt (yellow color 4), red pigment such as dinatrium salt (red color 4), or blue pigment such as dinatrium salt (blue color 1) can be exemplified.
  • the thickness of the coated film layer 4 is set to 0.5 to 50 ⁇ m. It is technically difficult to set the thickness less than 0.5 ⁇ m. On the other hand, if the thickness exceeds 50 ⁇ m, adhesion to a casting mold may occur when used as a laminated external packaging material 11 .
  • the laminated external packaging material 11 is disposed with the coated film layer 4 facing up. Then, the battery main body 10 is disposed on the coated film layer 4 as shown in FIG. 5(A) . Thereafter, as shown in FIG. 5(B) , the laminated external packaging material 11 is wrapped around the battery main body 10 and thermally bonded thereto by pressing a heated plate of 160° C. or below against the packaging material 11 from the outside thereof. As a result, the battery main body 10 and the laminated external packaging material 11 are thermally bonded and integrated with each other via the molten thermoplastic resin of the coated film layer 4 .
  • the temperature for the thermal bonding is low, which prevents thermal degradation, such as, e.g., melting of separators in the battery main body 10 or decomposition of the electrolytic solution. As a result, the high performance of the battery can be maintained.
  • both widthwise side excessive portions of the laminated external packaging material 11 will be formed into a cylindrical portion 11 a , respectively, at both ends of the battery main body 10 .
  • the exposed edge portions 1 a edge portions where the base film 1 is exposed, i.e., edge portions where thermoplastic resin is not applied
  • a part of an end portion reinforcing plastic component 12 is fitted into the cylindrical portion 11 a as shown in FIG. 5(C) , and then a heated plate of 180 to 220° C.
  • a protection layer can be preliminarily provided on the surface of the metallic foil 2 to give abrasion resistance, impact resistance, chemical resistance, and the like.
  • Such protection layer can be formed by adhering an oriented film 5 on the surface of the metallic foil 2 opposite to the adhering side of the base film 1 as shown in FIG. 7 or by applying thermoset resin on the surface of the metallic foil 2 opposite to the adhering side of the base film 1 to thereby form a thermoset resin layer 7 as shown in FIG. 8 .
  • the oriented film 5 a commonly used inexpensive all-purpose resin film, such as, e.g., PET, PEN, ON or OPP, can be used. It is preferable that the thickness thereof falls within the range of 8 to 40 ⁇ m. If it is less than 8 ⁇ m, it lacks versatility. If it exceeds 40 ⁇ m, it becomes expensive and the workability deteriorates. Furthermore, in order to improve the abrasion resistance, the oriented film 5 can be an oriented film with silica or alumina vacuum-deposited on the surface thereof, an oriented film with siloxane series resin coated on the surface thereof, or an oriented film 5 with a roughened surface.
  • the adhesive layer 6 can be the same as or similar to the adhesive layer 3 for adhering the base film 1 and the metallic foil 2 .
  • thermoset resin layer 7 can be made of resin, such as, e.g., epoxy series resin, acrylic series resin, or nitrocellulose series resin, capable of forming a rigid film by thermal hardening.
  • resin such as, e.g., epoxy series resin, acrylic series resin, or nitrocellulose series resin, capable of forming a rigid film by thermal hardening.
  • siloxane series resin of 5 mass % or less can be added to the aforementioned resin. It is preferable that the thickness of the thermoset resin layer 7 falls within the range of 0.5 to 5 ⁇ m. If it is too thin, insufficient effect as a protection layer can be obtained. On the other hand, if it is excessively thick, the resin layer becomes brittle and the processing unit cost also increases.
  • the coated film layer 4 of thermoset resin is formed on the entire surface of the base film 1 other than the exposed edge portions 1 a and 1 a of the base film 1 (see FIGS. 6 to 8 ).
  • the coated film layer is not limited to such structure, and can be, for example, constituted such that the coated film layers 4 are partially formed on the surface of the base film 1 other than the exposed edge portions 1 a and 1 a as shown in FIG. 9 .
  • a laminated film was prepared by adhering a PET film having a thickness of 12 ⁇ m as an oriented film on one surface side of a hard aluminum foil having a thickness of 100 ⁇ m made of JIS A3004-H18 material via polyester-urethane series adhesive and further adhering a CPP film (casting polypropylene film) having a thickness of 40 ⁇ m on the other surface side of the aluminum foil via the same adhesive as mentioned above.
  • an application liquid having a resin solid content of 40% was prepared by adding a solvent in which isopropyl alcohol and deionized water were mixed at a capacity ratio of 1:1 to a resin mixture in which 30 parts EVA resin having a vinyl acetate content of 40% and MI of 15, 30 parts EVA having a saponification degree of 20%, 10 parts terpene resin having a softening point of 90° C. and an average molecular weight of 1,500, and 10 parts SiO 2 having a particle diameter of 2 to 5 ⁇ m and a specific gravity of 2.5 to 2.7. Then, this application liquid was applied onto the CPP film as the laminated film so that the thickness after drying became 3 ⁇ m, and then dried by heating at 200° C. for 20 seconds to form a coated film layer of thermal adhesive resin to thereby obtain a laminated external packaging material for a battery.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 1 except that the thickness of the coated film layer of thermal adhesive resin was set to 1 ⁇ m.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 1 except that a PC film having a thickness of 50 ⁇ m was used as the base film in place of the CPP film.
  • thermosetting resin of epoxy resin was applied on the one surface side of the aluminum foil and heated to form a thermoset resin layer having a thickness of 2 ⁇ m.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 1 except that a PET film as an oriented film was not adhered.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 1 except that a coated film layer of thermal adhesive resin was directly formed on the one surface of the aluminum foil without using a CPP film as a base film.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 1 except that the thickness of the coated film layer of thermal adhesive layer was set to 15 ⁇ m.
  • thermal bonding to a battery main body of a lithium ion battery having a surface of a PET film was executed using a heated plate under the conditions of 160° C. ⁇ 0.2 MPa ⁇ 2 seconds
  • thermal pressure bonding to an end portion reinforcing plastic component of PP was executed using a heated plate under the conditions of 200° C. ⁇ 0.4 MPa ⁇ 3 seconds to package the laminate battery.
  • Table 1 the end portion reinforcing plastic component is abbreviated as “Plastic Comp.”
  • the laminated external packaging material in Examples 1-5 and Comparative Examples 1 and 2 was wrapped around a battery main body similar to that in Performance Evaluation Test 1 and fixed with an adhesive tape. Then, it was inserted into a 500 mm-by-500 mm polypropylene case with the adhesive tape side facing up, and irregular vibrations falling within the range of 5 to 100 Hz were given with a device according to JIS Z0232 for 6 hours, and then the external appearance of the laminated external packaging member and the existence or nonexistence of electrolytic solution leakage were observed. The results are shown in Table 1. The external appearance of the laminated external packaging material was evaluated as follows:
  • Performance Evaluation Test 1 Performance Evaluation Test 2: Bonding strength (N/15 mm) Vibration test Battery Plastic External Electrolytic main body Comp. appearance solution leakage
  • Performance Evaluation Test 2 Bonding strength (N/15 mm) Vibration test Battery Plastic External Electrolytic main body Comp. appearance solution leakage
  • Example 1 4.5 80.2 ⁇ Nil
  • Example 2 4.0 82.5 ⁇ Nil
  • Example 3 4.3 20.2 ⁇ Nil
  • Example 4 4.3 85.6 ⁇ Nil
  • Example 5 4.2 80.4 X Nil Comp. Ex. 1 4.5 2.1 ⁇ Nil Comp. Ex. 2 5.2 3.1 ⁇ Nil
  • the packaging material in the laminated external packaging material for a battery according to the first invention (Examples 1 to 5), the packaging material can be thermally bonded easily and assuredly to the resin film surface of the battery main body and also can be thermally bonded firmly to the end portion reinforcing plastic component regardless of the small bonding area. Furthermore, in the laminated external packaging material for a battery of Examples 1 to 4, since cracks are hardly generated even by the vibration test for the packaged laminate battery and it is excellent in strength, there is no risk of deterioration of the external appearance as a laminate battery as a final appearance and occurrence of electrolytic solution leakage.
  • a laminated film was prepared by adhering a PET film having a thickness of 12 ⁇ m as an oriented film on one surface side of a hard aluminum foil having a thickness of 100 ⁇ m made of JIS A3004-H18 material via polyester-urethane series adhesive and further adhering a CPP film (casting polypropylene film) having a thickness of 40 ⁇ m on the other surface side of the aluminum foil via the same adhesive as mentioned above.
  • an application liquid having a resin solid content of 40% was prepared by adding a solvent in which isopropyl alcohol and deionized water were mixed at a capacity ratio of 1:1 to a resin mixture in which 30 parts EVA resin having a vinyl acetate content of 40% and MI of 15, 30 parts EVA having a saponification degree of 20%, 10 parts terpene resin having a softening point of 90° C. and an average molecular weight of 1,500, and 10 parts SiO 2 having a particle diameter of 2 to 5 ⁇ m and a specific gravity of 2.5 to 2.7. Then, this application liquid was applied onto the CPP film as the laminated film at certain intervals (see FIG.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 6 except that the thickness of the coated film layer of thermal adhesive resin was set to 10 ⁇ m.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 6 except that a PC film having a thickness of 50 ⁇ m was used as the base film in place of the CPP film.
  • thermosetting resin of epoxy resin was applied on the one surface side of the aluminum foil and heated to form a thermoset resin layer having a thickness of 2 ⁇ m.
  • a laminated external packaging material for a battery was produced in the same manner as in Example 6 except that a coated film layer of thermal adhesive resin having a thickness of 15 ⁇ m was formed on the entire surface of a CPP film as a base film.
  • thermal bonding to a battery main body of a lithium ion battery having a surface of a polyamide (ON) film was executed using a heated plate under the conditions of 160° C. ⁇ 0.2 MPa ⁇ 2 seconds
  • thermal pressure bonding to an end portion reinforcing plastic component of PP was executed using a heated plate under the conditions of 180° C. ⁇ 0.4 MPa ⁇ 3 seconds to package the laminate battery.
  • the bonding strength to the battery main body of the laminated external packaging material and to the end portion reinforcing plastic component was measured. The results are shown in Table 2. In this table, the end portion reinforcing plastic component is abbreviated as “Plastic Comp.”
  • Each laminated external packaging material in Examples 6-9 and Comparative Example 3 was wrapped around a battery main body similar to that in Performance Evaluation Test 3 and fixed with an adhesive tape. Then, it was inserted into a 500 mm-by-500 mm polypropylene case with the adhesive tape side facing up, and irregular vibrations falling within the range of 5 to 100 Hz were given with a device according to JIS Z0232 for 6 hours, and then the external appearance of the laminated external packaging member and the existence or nonexistence of electrolytic solution leakage were observed. The results are shown in Table 2.
  • Performance Evaluation Test 1 Performance Evaluation Test 2: (N/15 mm) Vibration test Battery Plastic External Electrolytic main body Comp. appearance solution leakage
  • Performance Evaluation Test 2 (N/15 mm) Vibration test Battery Plastic External Electrolytic main body Comp. appearance solution leakage
  • Example 6 4.5 85.2 ⁇ (No change) Nil
  • Example 7 4.0 80.5 ⁇ (No change) Nil
  • Example 8 4.3 25.1 ⁇ (No change) Nil
  • Example 9 4.3 82.3 ⁇ (No change) Nil Comp. Ex. 3 4.5 2.1 Plastic Comp. Nil was detached, deformed
  • the packaging material in the laminated external packaging material for a battery according to the second invention (Examples 6 to 9), the packaging material can be thermally bonded easily and assuredly to the resin film surface of the battery main body and also can be thermally bonded firmly to the end portion reinforcing plastic component regardless of the small bonding area. Furthermore, in the laminated external packaging material for a battery, since the packaging material does not cause detachment of the end portion reinforcing plastic component even by the vibration test for the packaged laminate battery and it is excellent in strength, there is no risk of deterioration of the external appearance as a laminate battery as a final appearance and occurrence of electrolytic solution leakage.
  • a laminated external packaging material for a battery according to the present invention can be used as a laminated external packaging material for wrapping a main body of a battery for use as a power source for a mobile device, such as, e.g., a mobile telephone, a notebook-size personal computer, or a digital camera.
  • a mobile device such as, e.g., a mobile telephone, a notebook-size personal computer, or a digital camera.
US12/158,548 2005-12-22 2006-12-14 Laminate packing material for battery and laminate battery Active 2028-09-24 US8323827B2 (en)

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PCT/JP2006/324962 WO2007072736A1 (ja) 2005-12-22 2006-12-14 電池用ラミネート外装材及びラミネート電池

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CN101346831A (zh) 2009-01-14
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WO2007072736A1 (ja) 2007-06-28
TWI399877B (zh) 2013-06-21
DE112006003517T5 (de) 2009-02-12
KR101325345B1 (ko) 2013-11-08
CN101346831B (zh) 2011-12-14
TW200746506A (en) 2007-12-16

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